import type { BinaryOp, UnaryOp } from "../ast"
import type { Loc } from "./loc"

export type Operand = Loc | number

export type AbsInsnCopy = {
    type: "copy",
    dest: Loc,
    source: Operand,
}

export type AbsInsn2Unary = {
    type: "unary",
    dest: Loc,
    // NOTE: We convert binary -> unary when going SSA3 -> SSA2
    op: UnaryOp | BinaryOp,
    source: Operand,
}

// Abstract instruction in two-address form
export type AbsInsn2 = AbsInsnCopy | AbsInsn2Unary

export type AbsInsn3Unary = {
    type: "unary",
    dest: Loc,
    op: UnaryOp,
    source: Operand,
}

export type AbsInsnBinary = {
    type: "binary",
    dest: Loc,
    source: Operand,
    op: BinaryOp,
    source1: Operand
}

// Abstract instruction in three-address form
export type AbsInsn3 = AbsInsnCopy | AbsInsn3Unary | AbsInsnBinary